Josephson current in a superconductor-ferromagnet junction with two non-collinear magnetic domains

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dc.creatorCrouzy, B.
dc.creatorTollis, S.
dc.creatorIvanov, D. A.
dc.date2006-08-01
dc.date2007-03-06
dc.date.accessioned2026-07-07T07:49:58Z
dc.date.available2026-07-07T07:49:58Z
dc.descriptionWe study the Josephson effect in a superconductor--ferromagnet--superconductor (SFS) junction with ferromagnetic domains of non-collinear magnetization. As a model for our study we consider a diffusive junction with two ferromagnetic domains along the junction. The superconductor is assumed to be close to the critical temperature $T_c$, and the linearized Usadel equations predict a sinusoidal current-phase relation. We find analytically the critical current as a function of domain lengths and of the angle between the orientations of their magnetizations. As a function of those parameters, the junction may undergo transitions between 0 and $π$ phases. We find that the presence of domains reduces the range of junction lengths at which the $π$ phase is observed. For the junction with two domains of the same length, the $π$ phase totally disappears as soon as the misorientation angle exceeds $π/2$. We further comment on possible implication of our results for experimentally observable 0--$π$ transitions in SFS junctions.
dc.description9 pages, 4 figures, minor changes, references added
dc.identifierhttps://arxiv.org/abs/cond-mat/0608009
dc.identifierhttp://arxiv.org/abs/cond-mat/0608009
dc.identifierPhys. Rev. B 75, 054503 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.054503
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/125016
dc.subjectSuperconductivity
dc.subjectMesoscale and Nanoscale Physics
dc.titleJosephson current in a superconductor-ferromagnet junction with two non-collinear magnetic domains
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